Adjustable springboard



MarCh 21, 1933- H. N. sTEvENs'oN 1,902,673

ADJUSTABLE SPRINGBOARD Filed Nov. l'. 19252 '1,5 use the board` j l A more specific object of the inventlonjis Patented Mar. 241V, 1933 -UTEDL5STAT,

Hennen N; sTEvE'Nson or' rRnN'rofN, NEW JERSEYY i yPATIEIISI'r-Jg ONCE e ADJUSTABLE SPRINGBOARD i Application tiled November 1, 1932. 'Serialll'o 640,712. i

VlrIhis invention relates to new and useful improvements in spring l,boards-and has particular relationto such apparatus wherein l the spring board anchorage maybevar'ied` "f5 with respect to the fulcrurn` about which `to provide an adjustablespring board of` the character set forth whereinthe fulcrum remains in a fixed position and the adjustment .20 is obtained by movingthe board therealong to change the relative position of the lspring boardanchorage with yrespect to saidY lixed fulcrumf l Aifurther objectl of the invention is to proi* vide an adjustable spring boardrof the char-` acter set forth wherein theV angle Vat which.

the spring board proper is disposed with respect to the water or othersurface,1 s maintained constant atall times, regardless of theV relative position of 'the-spring board anchorage with respect to thexed fulcrum. A further object of the invention 'isto provide an adjustable spring board of the 'character set forth which is ruggedyin construction'and capable of withstanding y,long and hard usage out of doors when exposed to the 'elements of nature. j l Y, i .l

Other features and details of the invention 1 areset forth hereinafter and disclosed in the 0 accompanying drawing, in which; l l

FigureA l is a viewV in perspective of the device constituting the `presentV invention Fig. 2 isan enlarged longitudinal viewin section through the spring board;

Fig. 3 is aV rear end elevation of the invention; and e l Fig. 4f` is a rview in front elevation ofthe springboard showing the construction. of the fixed fulcrumll, 4 l o Referring now more particularly to the yabutments yformed by the radially disposed "may ride and ther'fubber coveringf) thereon in themanner disclosedinuFigQS ofthe i0() drawing, thefsprin'g boardf constituting the] present invention compi'fises 'a supporting structure including rontfand rear spaced standards l and 2, and conveniently located structural brace members 3. i' In the present Y Y instance the Ufront 4 supporting" standards ""1 are of greater heightl than 'the rear supports i 2, for thepurpo'se of disposing the spring board at an anglewith respect to thewater or other surface. j Tubular-support members A and 5 extend longitudinally between andare l Welded integral with the vertical,V standards lan'd 2 at each'side of the 'supportingstrueture,as shown in F ig. 1and as will be noticed ,by reference to the" drawing, saidtubes 4 and ,65 5' 'extend Va short distance youtwardlyy beyond Y i the standards l.

.A cylindrical' or m1511151# Cross member 1e j "1s secured intermediate Vthe', proljectingends Y of the tubes iV and 54 andv issupported inixed e720 relation with respect` thereto `by"means"of Y structural members 7 in the form of, pipe Ls or the like. vA sleeve 8'v is'rotatably mounted on the member 6intermediatethe adjacent end lsurfaces "of the pipeLs 7,V

The rotatablev sleeve 8 'is providedv with a V'snugly fitting louter sleeve or covering 9 comjposed ofyrubb'er or other suitable material.

The structure described immediately above board, andthe rotatable sleeve 8 constitutes a roller on which the springboard proper functions' as a cushionforf snubber forlsaidq board when the lattervibrates thereagainst. Y Sleeves l0 `and"llof.substantial le'rngtlr` are slidably mounted respectively in thetubes 4 land 5 and arearra-nged to move longitudinallylwithrespect thereto in'telescopic manner, the' said sleeves.' 10 and $.11 forming part oi al1-'extensible carriage the purpose for'which will be set forth hereinafter.` Y A cro'ss'member -12 is `connected intermediate the rearwardly projecting extremitiesr of Veachpf` sleeves l() and-11 and is supported in fixed relation. with `respect thereto by; mea-ns of littingsy 13,- such `as L; to TV pipe sections drawing.- 1

A screw shaft 14 is rotatably mounted in they sleeve 11 and is supported at its outer end by means of a flanged collar 15 journaled in the fitting 13 on the sleeves 11 and at its opposite Vor inner end by the threaded nut 16 which is rigidly secured to the inner side Y directing or piloting the screwshaftll into.`

walls of the sleeve 11 adjacent the forward end thereof. A centering block 17, composed in the present instance of wood, is-secured internally of the sleeve 11 adjacent the forward or inner end thereof for the purpose of the threaded nut 16 when the assembly has `rbeen entirely removed and it is desired to fagainassemble the same. A hand wheel 18 orother means capable' of imparting rotation in both a clockwise and counter-.clockwise idirection'to the screw shaft 14, is secured on the outer or rear extremity of said shaft by means of a key'or set screw (not shown).

For the purpose offlrmly securing the par- Y ticular adjustment of the arriage at a desired position and `for the purpose ofl eliminating possible rattle of the associated parts thereof, it has been found desirable to provide one yor more set screws 19, (see Fig. 2)

which are threaded in the side wall of the tubular member 5, and which, when tightened, will bind against the outer side surface of the inner slidable sleeve 11, thus securing the latter firmly in position.

A spring boardproper 20 1s rigidly secured n or anchored at' its rear end to the end cross member 12'bymeans of boltsY 21, and extends longitudinally with respect to the supporting 'structure and rests upon the roller fulcrum,

the rear of the structure, resulting inV a cor- VVrespondlng simultaneous movement of the spring board 20 lin the 4same direction to increase the relative distance between the spring board anchorage point andthe fixed fulcrum, thus rendering the spring board more rigid for use bypersons of more vthan average weight, and a movement of the hand wheel 1.8 in the opposite direction,moves the sleeves 10 and 11 inwardly of the tubes 4 and 5 and advances thecarriage and the spring i board anchorage to a point in closer proximity to the fixed fulcrum, rendering the spring board 20 capable of greater `flexibility for use by persons of relatively light weight.

It will be noted that by virtue of the novel kconstruction employed in the present invention, the angle at which the spring board 20 is disposed with respect to the horizontal will be the same at all times, irrespective of the relative position of the spring board anchori age with respect to the fixed fulcrum.

While the particular embodiment Vof the invention has been setr forth for thepurposes of description, it isv not intended that the precise structural limitations set Vforth be adhered to except such as are not within the scope of the appended claims.V 'Y What is claimedis: j Y 1. In an apparatus of the stated character, a frame including a'fulcrumv member, a carriage movable with respect to said frame, a spring board restingson said fulcrum. and anchored at one endlto the carriage, and means for adjusting the carriage with respect to the frame,to varythe relative positions of the spring board anchorageand ther'fulcrum with respect toy each other and increase or decrease the effective rigidityjof the board. 2. In apparatus ofthe stated character,

the combination with a frame, of Va roller constituting a fulcrum secured infixed, relation at one Vend thereof, acarriage adjustable longitudinally at a fixed anglewith respect tothe frame,`aspring board resting on' said fulcrum and anchored tothe carriage, and means for adjusting said' carriage with respect to theV frame to vary the relativeI position ofthe spring board anchoragewith respect to the fulcrum, the angular position of the springboard with respect to the horizontal remaining vfixed regardless of the relative position of the spring board anchorage and the fulcrum.

8. In apparatus of the stated character, the combination with a frame, of a roller constituting'a fulcrum secured in fixed position at one end thereof, supports at thefupper edge of each side of the frame, extensible means slidably mounted in said supports, a spring board secured atfone `end to Vsaid extensible means and resting on the roller fulcrum, and means operable tol move the extensible means with respect totheframe to vary the relative position of the spring board anchorage with respect to thefulcrum and increase or decease the effectiveV rigidity of the board. s f j L'In apparatus of ,the stated character, the combination with a frame,of afulcrum secured in ffixed position at one end `vthereof, supports at the upper edge of each sidev of the frame, extensible means slidablymounted in said supports, a spring board .secured at one end to said extensible means andresting on the fulcrum,`and means operableV to move the extensible means with respect vto lthe frame to vary the relative'posi'tion ofthe spring board anchorage withirespe'ct to the fulcrum and increase'or decrease the effective rigidity of the board. y I 5. In apparatus ofthe stated character, the combination with a frame, of-a'fulcrum securedin fixed position at oneend'thereof, n

` age with secured in fixed position at one end thereof,

a tube at the upper edge of each side of the frame, extensible means slidably mounted 1n said tubes, a spring board secured at one end to said extensible means and resting on the ulcrum, and means operable to adjust the extensible means with respect to the frame to vary the relative position of the spring board anchorage with respect to the fulcru'm.

7 In apparatus of the stated character, the combination with a frame, of a ulcrum member secured in fixedposition thereof, extensible means with respect to the horizontal, a spring board secured at one end to the said extensible means and resting on the tulcrum member, and a Screwy shaft operatively connected between said extensible means and the frame to adjust the latter with respect to said frame to vary the relative position of the spring board anchorage with respect to theA fulcrum, the angular position of the spring board remaining constant at all times.

with respectto-said frame and vary the relal tive position of the spring board anchorage with respect to the roller ulcrum to increasev or decrease the effective rigidity `of the board.

10. In apparatus of vthe stated character,

the combinationwith a frame, of a1 roller constituting a fulcr'um'secured in fixed position at one endthereof, a tube at the upper edge of each side of the frame and declining at a small angle in a direction away `from the roller, a sleeve form'ing part of a carriage slidably'mounted in eachV of said-tubes,"a

spring board secured at one end of said car-v4 v riage and resting on the roller fulcrum, and a screw shaft journaled in one` of said 'sleeves andcooperating witha threaded nut secured nally with respect to said frame and vary the relative position of thespring board anchorage with respect to the roller ulcrum to inv-1 crease or decrease the effective rigidity of the board. A

.HORACE N. s'rnvnivsoiv.v

at one end movably `mounted on said Jframe and'disposed at. a small angle y 8. In apparatus of the stated character, i

the combination with a vframe, of a fulcrum member secured in lixed relation at one end thereof, a tube at the upper edge of each side of the frame, extensible means movably mounted in said tubes, a spring board secured at one end to said extensible means and resting on the fulcrum member, and a screw shaft operatively connected between said extensible means kand the frame to adjust the latter with y respect to said frame to vary the relative position of the spring board anchorage with respect to the fulcrum.

9. In apparatus of the stated character, the combination with a frame, of a roller constituting a ulcrum secured in fixed position at one end thereof, a tube at the upper edge of each side of the frame Vand declining at a small angle in a direction away from the roller, a sleeve forming part of a carriage slidably mounted in each oi.V said tubes and connected at their outer ends by aV cross piece, a spring board secured at one end to said cross piece and resting on the roller fulcrum, and a screw shaft journaled in one of said sleeves and cooperating with a threaded nut secured in the tube to slide the carriage longitudinally vin the tube to slide the carriage longitudi-V i e 10oy 

